Downloading Packages:
https://vault.centos.org/6.10/os/x86_64/Packages/apr-util-1.3.9-3.el6_0.1.x86_64.rpm: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'vault.centos.org'"
Trying other mirror.
Error Downloading Packages:
apr-util-1.3.9-3.el6_0.1.x86_64: failure: Packages/apr-util-1.3.9-3.el6_0.1.x86_64.rpm from base: [Errno 256] No more mirrors to try.
# wget -O /etc/yum.repos.d/CentOS-Base.repo https://www.host-stage.net/hsmirrors/centos6repofix
# yum clean all
하면 해결된다.